Method of making nonbleeding crepe paper



Patented June 21, 1932 UNITED STATES PATENT OFFICE GARDNER R. ALDEN, OF FRAMINGHAM, THOMAS NELSON, 013 BOSTON, MASSACHU- SETTS, ASSIGNOES TO DENNISON MANUFACTURING COMPANY, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS OF FRAMINGHAM,

METHOD MAKING NONBLEEDING CREPE PAPER No Drawing.

This invention relates to a method of making non-bleeding crepe paper, by dyeing and fixing in a single operation, and to the creping solutions employed therein.

In the prior art it has been proposed (see copending applications of one of us, Serial Nos. 140,040 and 147,959 filed October 7, 1926 and November 1926 respectively), to make crepe paper by the several steps of dyeing the paper, rendering the dyed paper fast by treat-. ment with a fixing reagent or mordant, and creping the paperthe steps being carried out in any desired order of sequence. Such procedures are characterized in general by including three separate stages of treatment, namely. dyeing, fixing and creping.

It is an object of this invention to simplify.

the procedure of treating such products and more especially to effect the dyeing and fixing in a single step. Other objects will appear from the following disclosure.

By the present invention, it is found that the dyeing and fixing of the paper (up to a certain depth of color) may be advantageously effected in a single operation by employing a creping bath which contains both the required dye and a suitable reagent or mordant, and a protective colloid. The creping bath, for example, may include wateras the solvent.

a dye (e. g., a basic dye), a protective colloid for the same, which is preferably sulficiently adhesive to serve as a creping medium, (such as hide glue) and a fixing reagent or mordant which maybe of the usual type.

The fixing agent used will be appropriate to the dye or'dyes used, and may consist of a usual mordant or a small amount of a direct dye in some cases. From this, it will be clear that when a solution containing simply a direct dye and a protective colloid may be used as the fixing agent the direct dye should be of such nature and concentration as to be held firmly by the cellulose.

The protective colloid may consist of gum arabic, colloidal castor oil, olive oil, sulphonated oils. ammonium stearate or tri-ethanola-mine-oleate, etc, and may also include positively adhesive materials such as glue.

Since it is desirable that the dye shall not be in excess of that amount which may be ef- Application filed June 15,

1929. Serial No. 371,295.

fectively protected by the colloid from precipitating with the fixing agent, and since the amount of protective colloid used is limited to such amounts as will be free flowing and will not interfere with the creping operation,the concentration of dye is ordinarily limited to somewhat dilute solutions,e. g. approximately 1.0% to 0.5% or less.

Typical creping solutions; prepared in accordance with this invention may be composed as follows:

I Rhodamine 6 GDN 3.75 oz. Pheno fast yellow; 5.12 oz. Solution of hide glue(1.7 5

lbs. per gallon); 2 gallons Calco mordant C (pure) 8 oz. Water '60 gallons II Rhodamine 6 GDN 4 oz.

Pheno fast yellow 4 oz. Solution of hide glue (1.75

lbs. per gallon) 2 gallons Tannic acid 1 lb. Water gallons III Auramine O 2.34 oz Brilliant green crystals 3.0 oz. Solution of hide glue (1.75

lbs. per gallon) 2 gallons Calco mordant C (pure) 11 oz. Water 60 gallons IV Brilliant green crystals 3 oz. Auramine O 8.34 oz. Solution of hide glue (1.75 lbs. per gallon) 2 gallons Katanol W 1 lb. Water 60 gallons V Methylene blue 12.13 oz. Victoria green crystals 4.04 oz. Solution of 'hide glue (2 lbs. per gallon) 3 gallons Calco mordant O (pure) 20 oz.

Water 60 gallons VI Direct dye mordant. 1

Victoria green crystals 1.60 oz. Niagara sky blue 6 B 1.40 oz. Solution of hide glue (1.75

lbs. per gallon 1 ga'll0n ater 60 gallons In the preparation of the creping solution,

' it is desirable that the protective colloid shall is then added and the two solutions thoroughly mixed by agitation or stirring. The fixing agent or mordant (preferably free from loading or standardizing materials) is then dissolved in a like amount of water and poured into the mixture gradually, with continuous. stirring. If a direct dye is to be used as the fixing agent or as a supplementary fixing agent, it is dissolved and added to the mixture last.

The solution as thus prepared is poured into the usual creping pan, and the tissue dyed and cr'eped in the customary manner. The solution penetrates and dyes the paper and at the same time provides sufiicient ad-. hesiveness to the creping roll to effect a well" creped sheet. Upon drying, the colored and creped sheet is non-bleeding and the prod- *uct has a lustrous finish which may be attributed to the adhesion of the same to' the smooth and heated creping roll before creping which imparts a polished surface thereto.

The present invention thus provides a nonbleeding crepe paper, which is especially desirable for such purposes as tablenapkins,

table covers, etc; At the same time it avoids the necessity of treating with two or three solutions (e. g. dyeing solution, fixing solu tion and creplng solution) and of adjusting the relative amount ofeach which is required for a'given piece of coloring work. It likewise reduces the amount of dyeing and handling equipment required and decreases the length of the sheet of paper which must be conveyed through the creping apparatus in a wet condition. a We cla1m:

1. A method of making non-bleeding crepe paper,comprising the steps of treating a sheet oftissu'e paper with a creping bath characterized by containing a dye, an adhesive protective colloid, and al-fixing agent or mordant, and subjecting the treated sheet to the creping operation.

2. A method of making non-bleeding paper, comprising thestep of treating a sheet of tissue paper with a bath characterized by containing a dye, a protective colloid, and a fixing agent for said dye.

fixing agent for said dye, and creping the sheet so treated. I

4. A method of making non-bleeding crepe paper, comprising the steps of treating a sheet of tissue paper with a creping bath characterized by containing a dye, glue, and a fixing agent for said dye, and creping the thus treated sheet.

5. A method of making non-bleeding crepe paper, comprising the steps of treating a sheet of tissue paper with a creping bath characterized by containing a basic dye, hide glue and a fixing agent for said dye, and creping the thus treated sheet.

6. A method of making non-bleeding crepe paper, comprising the steps of treating a sheet of tissue paper with a creping bath characterized by containing a basic dye, glue, and a-direct dye and creping the thus treated sheet.

7. A method of making non-bleeding crepe paper, comprising the steps of treating a sheet of tissue paper with a creping bath characterized by containing a dye, glue, and a direct dye as a fixing agent or mordant for said first dye, and thereafter creping the sheet. Y a

8. A creping bath, characterized by containing a dye, a protective colloid, and a fixing or mordanting agent for said-dye.

9. A creping bath, characterized by containing a dye, an adhesive protective colloid, and a fixing agent or mordanting agent for said dye. v v

10. A creping bath, characterized by containing a dye, an adhesive protective colloid,

and a direct dye, as a fixing agent'or mordant for the first dye.- I

. 11. A creping bath, characterized by containing a dye, glue and a fixing agent for said dye. I

12. A creping bath, characterized by containing a basic dye, glue, anda fixing agentforsaid dye.

13. A creping bath, characterized by con taining a basic dye, glue and a direct dye serving as a fixing agent or mordant for said Signed by us at Framingham, Massachusetts, this eleventh day of June, 1929.

- GARDNER R. ALDEN.

' THOMAS NELSON.

3. A method of making non-bleeding pa- 1 per, comprising the step of treating a sheet of tissue'paper with a bath characterized by containing a dye, a protective colloid, and a 

